Disconnecting switch



Ffib. 18, 1930. j f w ss 1,747,460

DISCONNECTING SWITCH Filed Aug. 23, 1926 5 i 1 5 i i a -a r-1 2/ l hi WITNESSES: INVENTOR @11 ZW; A/frad 7TTw/Js.

Patented Feb. 18, 1930 UNITED STATES.

ALFRED T. TwIss,'oF TRAFFORD, PENNSYLVANIA, ASSIGNOR To weswmeaoeenaaee- TRIO & MANUFACTURING COMPANY, A CORPORATION on PENNSYLVANIA nIscoNNncTING swr'r'ctr Application filed August 23, 1926. Serial No. 130,843. I

My invention relates to electrical transmis- 's'ion apparatus, and particularly to disconnecting switches.

One object of my inventionis to provide a disconnecting switch for out-of-door use that shall be capable of breaking a coating of ice when the movement of separation between the contact members begins.

, contact member.

I propose to avoid this difficulty by providing such'lost-motion connection in the operating mechanism that the moving contact member is given a slight wiping movement across the stationary contact member for the purpose of cracking such a coating of ice before the contact members start to separate.

The accompanying drawing is a view, partially in elevation and partially in section, of a disconnecting switch embodying my invention. 1

My invention comprises a disconnecting switch 1 comprising the usual base 2, terminal members 3, one of which supports a stationary contact member 4, and a movable contact member 5 that is mounted on an insulator 6 connected, through a lost-motion connection 7, to an operating mechanism 8.

The terminal members 3, stationary contact member 4 and movable contact member or link is extending' throng-nae base mm a second bell Crank 19 to which is' attached LII operating handle 21. I

The lost-motion connection 7 comprises the flange 11, thepintle 12 and the crank arm 13. The latter has an elongated and curved outer surface that bears against the under surface amount of turning movement about the pintle 12 before the surface 22 engages the flange 11, after which the two members move as a unit. 1 I i r To operate the disconnecting switch, handle 21 is pulled downwardly, which movement is transmitted through the lever system 8 to turnthe bell crank 14 in a clock-wise direction. The' initial turning movement of the crank arm 13 produces a relativeturning movementbetweenit and the flange 11 about the pintle 12. This movement causesthe switch blade 5 to turn relatively to the stationary contact member 4 but not to de part therefrom. I

The foregoing movement of the switch blade 5 is sufficient to break" any coating, or

mantle, of ice that may enclose it and the stationary contact member 4, since ice is r'elatively weak when placed in tension. Afarther turningmovement of the bell crank 14 causes the surface 22 of the crank arm 13' to firmly engage the undersurface of flange 11, thereby preventing further turningmovement about the'pin'tle 12. Thereafter, the switch blade 5 is movedaway froni'the stationary contact" member 4 in the arcof a circle 1n a manner well-known about the shaft 15, i-ntheart; I r

Accordingly, I have provided a disconnecting switch in which lost-motion connection I is provided between thes'upp'ort-ing insulator for the switchbladeandthe actuating ine'0'lia I nis'ln in order that the switch-blademay be given a slight wipingor turning movement relative to the stationary eentact'member beg I fore the contact; memberadefinitay starttof separate. v k

It is to be understood that various changes in the arrangemen't anddetails ofthe coinpo- ,of the flange 11 so that there is a certain neat partsofmy inventionmay be made-with- I theeeope'oe the appefidee claims."

[1 I claim as my invention:

1. In 7 avdisconnecting switch, a pair of '1; lst m otion' connection-to one of the 9. In a disconnecting switch; a' pair of i '1 I levers 1 i j spaced terminalmembers ia 'movable contact "75 t 2. Infa disconnecting switch,"- a; pair of 'member' for complet ngtha-circult between a I j the terminal members, :o eI-ZLFiI g-QI Bans forfr I 11 the cont'act member comprising asystemof the terminal' members, operating means'for the movableaeontact member comprisin'ggra systemof'levers and an insulator supportingthe movable'contact member and having a spaced terminal members," a movable contact member for completing. the circuit between" r en-tai antla insu ate-r s pp ng h Contact memberfo comp etingfs hi c e a emberaane rivot y m ntedg n ne o the spaced terminal-m'embers, a movable contact t rininalmembers; operating means for 7 contact member, compr sing a system-of the movable contact memberw comprisinga system of levers; an insulator for su'pport-i ing the movable contact m'ember for angular movement of" the insulator with the lever. T I

the terminal members, operating means for the contact'memberincludinga pivoted meml ber andaninsulatorfor supportingthe contact memberonthe'pivoted member in such to the insulatoraboutfthe contactmember a mannerasto'lmpart antangular movement V before it ismovecl angfularlywith thepivoted v 7 i853 pa ed. t mina mbersvamo ab c tac A member forcompletingthe c1rcu1t;betWe'en j the terminal members, wa ibellcrank pivoted" onfa supporting pin, .an, insulator for 'sup- 1 levers; an insulator supporting the contact a asfmemberancl pivotally mounted onconeof the porting the contact memben imeans for piv-Q saidrlevers ancl-means forlimitingthe pivotal otally mounting the insulator 'on ionei leg of movement of the insulator. v A -1'novable--; switch arm I for adisconnecting svvitch comprising a supporting shaft, a t v 30. crank connected-thereto, actuating means .rconne cted to one arm oi-the crank, an insula- :tor havinglialost-motion connection to the other armj0f the crank,-and a contact memimpart an angular'movement toithe insulatorf first about the contact member. and thereafter about the supportingpin'.

bersupportedby thei,nsulator.. 35,, 5 A' -movable-switch arm forga disconnect- :'-ing=fi jt h: p g: a support gs means-for actuating theshafh aicontact mem- 'f ber, a supporting.insulator ifor'the contact a j I I inember fanda linkfor supporting the.insula, r

" f "actorin:suchHamanneras to permit angular ,4 a V '.movement:therebetvveenantljmountedon the v I shaftj totjpermit angular, movement therej, 6 ovablefsvvitch arm fora disconnectt f in g switch; comprising 5a 7 supporting shaft, VIIIQQJISJIE actuating theshaft, a contactmemj .t ber gfa upportingv insulatorsfor; the contact yim mberaw mea f r upp r g the n r" latorjjadapted to'per mit angular movement a v. ma henebe we n, and'fing l ov me ou 7 715A movableswitch'arm fora disconnect,- 11 upp r i' ai t 'iaacrankcon ct !v here qy a g e a '7 10 nn cted i rOgk cIlc arin ofthe shaft, another 'iotgt he rank terminating in a curved a e-a sulat n p vo ly m u e io a astgained crank arm andhaving 'a'lost mqt n' nectionr iv to'the rved paced e minal me bers,am vabl 'q T '1 membrv ;i.for omple inghe r itu wree .7 the e minalrmemh ra opemti g*mans for a a the bellcrank 'and'operatingfmeans attached to the other leg-of the;bellcrank ada tedjm V In testimony vvhereof,Ihavehereuntogub- 1 scribedmy name' this 5th igl'ay vofIAugust, 

